Uttaratantra Shastra

Uttaratantra Shastra (Skt. Mahāyānottaratantra Śāstra; Tib. ཐེག་པ་ཆེན་པོ་རྒྱུད་བླ་མའི་བསྟན་བཆོས་, Gyü Lama, Wyl.theg pa chen po rgyud bla ma'i bstan bcos; Trad. Chin. 分別寶性大乘無上續論), Treatise on the Sublime Continuum or the Ratnagotravibhaga. One of the Five Treatises of Maitreya, a commentary on the teachings of the third turning of the wheel of Dharma explaining buddha nature. It was first translated into Tibetan by Ngok Loden Sherab and the Kashmiri pandita Sajjana. It is included among the so-called "Thirteen great texts", which form the core of the curriculum in most shedras and on which Khenpo Shenga provided commentaries.

The disposition is empty of the adventitious stains,
Which are characterized by their total separateness.
But it is not empty of the unsurpassed qualities,
Which have the character of total inseparability.

Illness must be understood, its causes eliminated,
Wellbeing must be attained, and medicine taken.
Likewise, suffering, its causes, their cessation and the path
Must in turn be understood, eliminated, realized and relied upon.